Thanks everyone for your tips!
@Miriam: I checked out those sites and I really could find some usefull tips there, thanks!
@Sajjad: That's a good idea to go to Gilan province in the search for good food. I've already tried Iranian food many times before and most of the dishes that I really like indeed happen to originate from Gilan province!
@Majid: I looked up some pictures of Tange Reghez in Google and it looks wonderfull, mersi!
@Mumtaz: That sounds like a really great and unforgettable experience! I will probably go there in the summer so no pomegranate for me this time, but I will definitely keep it in mind when I go another time!